Abstract:

Tomato (Solanum lycopersicum), as an important economic crop, is widely and intensively cultivated. However, large-scale cultivation has led to soil continuous cropping obstacles, which directly threaten the sustainable and stable development of the greenhouse industry. Studies have shown that microbial agents can significantly improve soil quality and mitigate the toxicity of heavy metals and pesticides. This study conducted a five-year experiment on tomato fields under long-term continuous cropping, applying conventional fertilization and microbial fertilizer treatments. The evaluation indicators included soil nutrient content, enzyme activity, allelopathic substances content, and tomato yield. The results indicated that long-term continuous cropping led to a decrease in soil nutrient content, an increase in allelopathic substance content, and a reduction in tomato yield. However, microbial fertilizers and microbial agents were found to alleviate the soil continuous cropping obstacles and improve soil health. Additionally, we observed significant correlations between tomato yield and soil organic matter, total nitrogen content, available potassium, and POX enzyme activity, with correlation coefficients of 0.720, 0.645, 0.701, and 0.596, respectively. In conclusion, microbial agents can effectively regulate soil health and mitigate tomato continuous cropping obstacles. The findings of this study provide scienjpgic evidence for soil health management and the prevention of tomato continuous cropping obstacles.

Key words: Solanum lycopersicum, continuous cropping obstacle, microbial fertilizer, microbial agents